Licho wrote:Well, umm, this syustem (regaining energy by braking) is already implemented in standard air car design, but even with this, it can onyl drive 100km at very low speed
Kingcoal wrote:Go ahead and build it, but you are correct in calling it a dumb idea. You might want to read up on some things first:
http://www.fact-index.com/t/th/thermodynamics.html#The%20Laws%20of%20Thermodynamics
The problem is very simple and explainable with high school physics. You have to go up a hill to use the brakes coming down the other side (unless this is a one way vehicle.) Supposing you use 50% of your air pressure to get up a hill, how much will you recover braking your way down the other side? Less than 50%. Friction and therefore heat, the enemy of any closed system is produced and radiated into the air increasing entropy. The heat loss is produced while coaxing the vehicle up the hill and also coming down the other side.
Thermal Dynamics is the much hated science that explains why perpetual motion, these days called free energy devices don't work.
dontworryaboutpeakoil wrote:... an air tank that can hold enough air for 60Km and is totally safe.
dontworryaboutpeakoil wrote:... an air tank that can hold enough air for 60Km and is totally safe.
dontworryaboutpeakoil wrote:I want to get started on this project. Does anyone want to help me develop the subsystems?
by your logic why not?dontworryaboutpeakoil wrote:Going uphill won't use 50% of the air pressure! Say an air tank can provide 60KM range, and we have 2 air tanks onboard for a total of 120KM range.
Whenever the brakes are used, the air tanks will be continuously refilled by this energy. Since it takes only 2 minutes to refill an airtank, the range of the air car can be continuously extended. The range won't be limitless
why comparable not half, twice or 10 times?but my guess is it will be comparable to the range of a conventional car.
When the Air car arrives home, you simply plug it in the wall and recharge both air tanks for tomorrow.
dontworryaboutpeakoil wrote:I want to get started on this project. Does anyone want to help me develop the subsystems?
I need someone who can design an air tank that can hold enough air for 60Km and is totally safe.
I regenerative brakes powering a Lithium battery much like the ones in today's Hybrids.
I a 2 or 4 piston engine that uses air pressure to generate sufficent torque and horsepower to move 2,000lbs at up to 90MPH.
I need a lightweight electric air pump.
dontworryaboutpeakoil wrote:The Air Car IMHO is superior to Fuel Cells since no hydrogen fuel is needed. Only compressed air and the power to compress it is needed. If not enough energy can be recaptured from braking alone, why not install a 2-3 gallon bio-diesel tank? Use the fuel to power the on-board compressor motor to refill the air tanks in about 2 minutes. Doing this several times should extend the range of the Air Car to several hundred to a thousand Kilometers which is comparable to the standard cars of today. I don't think this idea is implemented in the Air Car.
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